[c-nsp] 7206VXR and CBWFQ

Mon Oct 20 05:20:07 EDT 2008

Please don't tell that  to this router  

policy-map llq
  class sipRTP
    priority 512
  class class-default
    fair-queue
    random-detect

vc-class atm CVPHDSL-VoIP
  vbr-nrt 1524 1524
  encapsulation aal5snap

interface ATM3/0.20842 point-to-point
 description cust 1
  ip address192.168.0.41 255.255.255.252
 pvc CVPH_CUSTVOIP 208/42
  class-vc CVPHDSL-VoIP
  service-policy out llq

7200-accessjn3#sh policy-map int ATM3/0.20842
 ATM3/0.20842: VC 208/42 -

  Service-policy output: llq

    queue stats for all priority classes:

      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/0/0
      (pkts output/bytes output) 5466056/418685691

    Class-map: sipRTP (match-all)
      5466056 packets, 418685691 bytes
      5 minute offered rate 61000 bps, drop rate 0 bps
      Match: access-group 5
      Priority: 512 kbps, burst bytes 12800, b/w exceed drops: 0

    Class-map: class-default (match-any)
      492783 packets, 493906760 bytes
      5 minute offered rate 509000 bps, drop rate 0 bps
      Match: any
        492783 packets, 493906760 bytes
        5 minute rate 509000 bps
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops/flowdrops) 0/50/0/50
      (pkts output/bytes output) 492733/493866217
      Fair-queue: per-flow queue limit 16
        Exp-weight-constant: 9 (1/512)
        Mean queue depth: 0 packets
        class     Transmitted       Random drop      Tail/Flow drop Minimum Maximum Mark
                  pkts/bytes        pkts/bytes       pkts/bytes    thresh  thresh  prob

        0          486842/493318682       0/0             50/40543             20            40  1/10
        1              54/22464           0/0              0/0                 22            40  1/10
        2               6/746             0/0              0/0                 24            40  1/10
        3               0/0               0/0              0/0                 26            40  1/10
        4               5/330             0/0              0/0                 28            40  1/10
        5              20/1200            0/0              0/0                 30            40  1/10
        6            5753/515372          0/0              0/0                 32            40  1/10
        7              53/7423            0/0              0/0                 34            40  1/10

http://www.cisco.com/en/US/tech/tk39/tk824/technologies_configuration_example09186a0080094cf6.shtml

Brian

________________________________

From: Victor Cappuccio [mailto:vcappuccio at gmail.com] 
Sent: venerdì 17 ottobre 2008 18.52
To: Brian Turnbow
Cc: Networkers; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] 7206VXR and CBWFQ

Hi, 

Subinterfaces and software interfaces do not have their own separate transmit (Tx) ring; therefore, no congestion can occur. These interface types include dialers, tunnels, and Frame Relay subinterfaces, and will only congest when their main hardware interface Tx ring congests. The Tx ring state is an indication of congestion for software interfaces.

router(config)# interface Serial0/0.1
router(config-subif)# service-policy output test
 CBWFQ : Not supported on subinterfaces

1.- Create a child or lower-level policy that configures a queueing mechanism. In the example below, we configure LLQ using the priority command and CBWFQ using the bandwidth command. Refer to Congestion Management Overview for more information.

          policy-map child 
           class voice 
            priority 512

2. Create a parent or top-level policy that applies class-based shaping. Apply the child policy as a command under the parent policy since the admission control for the child class is done based on the shaping rate for the parent class.

          policy-map parent
           class class-default 
            shape average 2000000 
            service-policy child 

3. Apply the parent policy to the subinterface.

          interface Serial0/0.1
           service-policy parent 

Cisco Page: http://tinyurl.com/ytt8ge

Note: Class-based shaping works at the interface and subinterface level. Cisco IOS 12.2(2.5) introduces the ability to configure shaping on the main interface and IP addresses on the subinterfaces.

thanks,

Victor Cappuccio
CCIE R/S# 20657
CCSI# 30452
www.anetworkerblog.com

On Fri, Oct 17, 2008 at 6:19 PM, Brian Turnbow <b.turnbow at twt.it> wrote:

	Your pvc needs to be abr/vbr/cbr
	You can't do it on ubr

	Regards

	Brian

	-----Original Message-----
	From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Networkers

	Sent: venerdì 17 ottobre 2008 17.10
	To: cisco-nsp at puck.nether.net
	Subject: [c-nsp] 7206VXR and CBWFQ

	 Whenever I try to apply the following I get an error message about how
	CBWFQ can't be applied to subinterfaces.  What is the correct way to do
	this?

	Thanks,
	Chris

	class-map match-any VOIP
	 match ip dscp ef
	 match  precedence 5
	 class-map match-all CRITICAL
	 match access-group 100

	 policy-map MyCBWFQ
	 class CRITICAL
	  priority 48
	 class VOIP
	  bandwidth 320
	  set precedence 6

	vc-class atm MyClass
	 ubr 1536
	 encapsulation aal5mux ppp Virtual-Template5

	interface Virtual-Template5
	 ip unnumbered Loopback0
	 service-policy output MyCBWFQ
	 peer default ip address pool default
	 ppp authentication pap callin

	interface ATM2/0.1921 point-to-point
	 pvc 1/1921
	 class-vc MyClass

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